I wonder if we are looking in the wrong places to assess the state of the world. The twilight of an era, as in Vienna a little over a century ago, is always murky. With nationalism and xenophobia resurgent, examples of humanity’s basest instincts abound. They grab the headlines. At the same time, community and sharing, often across national borders, through digital platforms like Airbnb, BlaBlaCar and Facebook, expand. This is the world’s undercurrent.